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| author | Konstantin Belousov <kib@FreeBSD.org> | 2015-09-25 13:03:57 +0000 |
|---|---|---|
| committer | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2017-10-12 07:04:10 +0200 |
| commit | f013c1476e3c1184aa18d7e33fd219e253db192f (patch) | |
| tree | b4f5916548b24555011755f9cd52f82c2b7f669e /cpukit/score/src/smp.c | |
| parent | timecounter: Merge FreeBSD change r304285 (diff) | |
| download | rtems-f013c1476e3c1184aa18d7e33fd219e253db192f.tar.bz2 | |
timecounter: Merge FreeBSD change r288216
Use per-cpu values for base and last in tc_cpu_ticks(). The values are updated lockess, different CPUs write its own view of timecounter state. The critical section is done for safety, callers of tc_cpu_ticks() are supposed to already enter critical section, or to own a spinlock.
The change fixes sporadical reports of too high values reported for
the (W)CPU on platforms that do not provide cpu ticker and use
tc_cpu_ticks(), in particular, arm*.
Diagnosed and reviewed by: jhb
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Update #3175.
Diffstat (limited to 'cpukit/score/src/smp.c')
0 files changed, 0 insertions, 0 deletions